Physics · Interference: Young's double-slit experiment and expression for fringe width, coherent sources and sustained interference of light
Instead of using two slits, if we use two separate identical sodium lamps in You
Instead of using two slits, if we use two separate identical sodium lamps in Young's experiment, which of the following will occur?
- A. General illumination
- B. Widely separate interference
- C. very bright maxima
- D. Very dark minima
Step-by-step solution
Two separate sodium lamps are incoherent sources because they emit light with random phases and no fixed phase relationship. Without coherence, no stable interference pattern can form. Instead, the intensities add up, resulting in general illumination with no distinct fringes.
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